diff --git a/src/include/postmaster/autovacuum.h b/src/include/postmaster/autovacuum.h
index 174e91a64a..d383fd3926 100644
--- a/src/include/postmaster/autovacuum.h
+++ b/src/include/postmaster/autovacuum.h
@@ -14,6 +14,8 @@
 #ifndef AUTOVACUUM_H
 #define AUTOVACUUM_H
 
+#include "storage/block.h"
+
 /*
  * Other processes can request specific work from autovacuum, identified by
  * AutoVacuumWorkItem elements.